Anchoring for concrete or the like



Aug. 11-, 1942. RS. PEIRCE 2,292,398

I ANCHORING FOR CONCRETE OR THE LIKE Original Filed May 1. 1937 Patented Aug. 11, 1942 ANCHORING FOR CONCRETE OR THE LIKE Ralph S. Peirce, Hinsdale, 111.; Ethel C. Peirce,

adminis'tratrix of said Ralph S. Peirce, de-

ceased Original application May v1, 193.7, Serial No. 140,176. Divided and this application May 15, 1939, Serial No. 273,821

2 Claims.

This invention relates to anchorings for concrete or the like, more particularly for anchoring two bodies of concrete together.

Among other objects the invention aims to provide improved means of this type which is simple in construction and operation and which effects enhanced holding capacity.

The invention is also inclusive of an improve method for this purpose.

Other objects and advantages will be apparent from the following description taken together with the accompanying drawing, in which- Figure 1 is a sectional view, partially in elevation, showing one form of my improved means;

Figure 2 is a partial perspective View of the tool shown in Fig. 1;

Figure 3 is a perspective view in separate relation of a modified form of parts of means shown in Fig. 1;

Figure 4 is a perspective view of modified parts shown in Fig. 5;

Figure 5 is a sectional view, partially in elevation, including the modification shown in Fig. 4; and

Figure 6 is a further modification.

Referring in detail to the illustrative embodiments shown in the drawing, the body of concrete H! or the like has a recess ll therein, which recess may be formed either at the time the concrete is poured or afterward.

For purposes of anchoring to the concrete It another body of concrete 2 for example, the bolt [3 is inserted in the recess H, such bolt being shown in this instance provided at its outer end with the hook termination 14 and at the other end of its shank with the head I5, which as here shown is of frusto-conical formation. As clearly shown in Fig. l, the shank of the bolt is inserted with the head l5 abutting the inner end l6 of the recess l I, and encircling the bolt at this point is the expansion device represented by the soft metal cylinder l1 and the harder expanding collar [8. While the collar i8 is of harder metal than the cylinder l'I it is desirably not so hard as the metal of the bolt it but is adapted to itself flatten out while at the same time expanding laterally the soft metal cylinder I1 upon the head l5 and into engagement with the walls of the recess H.

The expedients thus far described are conventional, but for expanding the parts Ii, 18 just described, I have provided the novel tool l9, preferably of hard steel, the inner end 20 of which is in the form of a slotted tube having a slot 2| therein. By reason of the gooseneck end 2-3 of the tool isoiT-set from the bolt 13 w 'le at the same time the tool may receive the blows of the hammer or the like as at 24 propelling its inner end 25 against the collar l8, and thus tamping and setting the expansion device. By reason of the arrangement just described, the shank of the bolt 13 may carry a second expanding device such as the second cylinder '26- and second expanding collar 27, these being shown in Fig. 1 prior to expansion.

After expansion of the parts l1, it as already described, the tool may be withdrawn from the recess and the cylinder 26, which is also of soft metal, with the expanding collar 21 in contact therewith, may be inserted next into the recess M. It will be noted that inthis instance the expanding collar 21 is also of frusto-conical forma- 7 tion with its smaller end 28 received within the counter-bore 29 in the cylinder 26. the tool 23 or the like, the parts 26, 21 may then be expanded inthe recess ll similarly to the parts ll, l8, the parts 26, 21' thus providing a metallic filler for said recess between the firstmentioned expansion device and the outer end of the recess. This filler may be expanded as described until the expanded outer face of the expanding collar 21 is just fiushwith the outer face 30 of the concrete body Hi.

The projecting hook end M of the bolt may thereafter afford securing means for an object attached thereto, or for embedment in an initially plastic body of concrete such as [Z poured adjacent the first body I0.

22 the outer As shown in Fig. 3, the second expansion device may be in the form of a split sleeve, this being conveniently comprised of the soft metal cylinder 3| and the expanding collar 32 of harder material both of which are split so that they may be inserted on the shank of the bolt [3 after the parts ll, l8 have been expanded, thus eliminating the necessity for the gooseneck in the tool 19 and permitting the use of a straight tool. Preferably when the split sleeves are used, one of these, such as the cylinder 3i, has lugs 33 on each of its segments interengaging with the other segment as by being frictionally received in notches therein to maintain the sleeve parts, and with them the collar parts, together against casual displacement.

As shown in Fig. 4 the split sleeve 34 may have its end 35 reduced in diameter and the segments of the sleeve held together against casual displacement by the thimble 36 which fits over the reduced end 35. This thimble need not be split, as it may be slipped around the hooked end, of

By means of the bolt l3 after the parts l1, l8 have been tamped.

Instead of the part 34 being of soft metal like the parts [1, 26 and 3|, to be tamped flush with the outer face 30, it may in accordance with the present invention be of cast iron, steel or other hard material; and may thus extend, of substantially equal diameter with the recess ll, across the mating faces 31 of the adjacent bodies of concrete l and I2, as shown in Fig. 5. In this instance, the bolt may be a straight bolt 38 having a head 38a similar to the head I and a threaded outer shank 39 upon which the split sleeve 34 and thimble 36, securing the halves of the sleeve together may be placed, and retained in position as by a washer 40 and nut 4| screwed home thereon. It will be understood that this is done before the second body of concrete I2 is poured and that this body is thus molded about the threaded end 39 of the bolt with the parts thereon as described embedded therein, all of these together providing a reinforcement and anchor for the molded body I2. The advantage of extending the hard sleeve 34 or other filler across the mating faces 31 of the adjacent concrete bodies I0 and I2, with a diameter relatively larger than that of the bolt for a substantial distance on each side of these mating faces is that the resistance to shear of the concrete along this mating face is enhanced, with also less tendency for the bolt to work loose in the second concrete body l2.

In place of the split sleeve 34, the split sleeve 42 shown in Fig. 6 may be used. This split sleeve 42 has the part 43, shown in full lines and the part 44 shown in broken lines, each of which comprises a short unbroken cylindrical section,

short enough to be turned by the hooked end I4 of the bolt, and each of these sections 43, 44 having integral therewith a longitudinally extending partially cylindrical section, these two partially cylindrical sections mating together to form the complete cylindrical sleeve 42.

The present invention is particularly useful and advantageous in the construction of laneat-a-time concrete roads or for the widening of such roads after the original road has been in use, to prevent objectionable abrupt changes in level between the old and new sections.

This is a division of my co-pending application Serial No. 140,176, filed May 1, 1937, which issued May 16, 1939, as Patent No. 2,158,302.

Such changes may be made as fall within the scope of the following claims without departing from the invention.

Having described my invention, I claim- 1. In anchorings for adjacent bodies of concrete or the like, the combination of a metallic anchor device having a head received in a recess in a face of one body of concrete and a protruding shank portion having a hook-shape outer end extending into said adjacent body, said shank portion at the face of the concrete both inside and outside of the recess being of substantially less cross-section than the outer end of the recess, an expansion device expanded on said head within the recess and terminating short of the outer end of the recess, a reinforcing longitudinally split sleeve metallic member of greater cross-section than said shank on said shank partially Within the recess and protruding with said shank outwardly of the recess into said adjacent body, said reinforcing member terminating short of both ends of the shank, and means retaining said reinforcing member in position.

2. In anchorings for adjacent bodies of concrete or the like, the combination with adjacent said bodies, of a metallic anchor device having a portion received in a recess in a face of one body of concrete and a protruding shank portion of substantially smaller cross-section than the outer end of the recess extending into the other body, means at the inner end of the recess securing the device within the recess, and a rigid reinforcing element disposed permanently along said device partially within the recess and protruding with said device outwardly of the recess into said other body whereby the effective cross-section of the anchor device is enhanced by said reinforcing element to reinforce the joint at said face between said one body and the other of said bodies when the latter is poured abutting said face to embed said anchor device Within said bodies.

RALPH S. PEIRCE. 

